The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)
- Volume 39 Issue 6
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- Pages.641-658
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- 2001
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- 0301-2875(pISSN)
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- 2005-3789(eISSN)
FRACTURE STRENGTH AND MARGINAL FIT OF IN-CERAM, COPY-MILLED IN-CERAM, AND IPS EMPRESS 2 ALL-CERAMIC BRIDGES
- Hwang Jung-Won (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
- Yang Jae-Ho (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
- Lee Sun-Hyung (Department of Prosthodontics, College of Dentistry, Seoul National University)
- Published : 2001.12.01
Abstract
All-ceramic restorations have become an attractive alternative to porcelain-fused-to-metal crowns. In-Ceram, and more recently IPS Empress 2 were introduced as a new all-ceramic system for single crowns and 3-unit fixed partial dentures. But their strength and marginal fit are still an important issue. This study evaluated the fracture resistance and marginal fit of three systems of 3 unit all-ceramic bridge fabricated on prepared maxillary anterior resin teeth in vitro. The 3 all-ceramic bridge systems were: (1) a glass-infiltrated, sintered alumina system (In-Ceram) fabricated conventionally, (2) the same system with copy-milled alumina cores (copy-milled In-Ceram), (3) a heat pressed, lithium disilicate reinforced glass-ceramic system (IPS Empress 2). Ten bridges of each system with standardized design of framework were fabricated. All specimens of each system were compressed at
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